NCIt synonyms : Inverted Papilloma of Sphenoid Sinus; Inverted Papilloma of the Sphenoid Sinus; Sphenoid Sinus Inverted Schneiderian Papilloma;
NCIt definition : A benign neoplasm that arises from the ciliated respiratory mucosa that lines the
sphenoid sinus. It results from the invagination and proliferation of epithelial cells
in the underlying stroma.;